Hello, I use a paypal button to sell a product. I need to send a confirmation email to the buyer immediatly for this I need some type of instant information to my website that an order was placed. I wanted to avoid ecommerce systems for that and do it myself, but I have trouble finding a starting point.
You can use PayPal Webhooks for this. It will send a notification to a listener that you configure, which can then use all of the data in that notice to automate tasks.
